/// <summary>
/// Preparing params for request
/// </summary>
/// <param name="public_key">Public API-key</param>
/// <param name="private_key">Private API-key</param>
public void Prepare(string public_key, string private_key)
{
Key = public_key;
Params = Params ?? new Dictionary <string, string>();
Params.Add("key", public_key);
Data = JsonConvert.SerializeObject(Params);
Signature = SHA512HMAC.Generate(Data, private_key);
}
/// <summary>
/// Initializes all required instances.
/// </summary>
public HashAlgorithmRegister()
{
psi_128bit = new implementations.psi.utility.UsageHelper_Hash();
md5 = new MD5();
md5hmac = new MD5HMAC();
ripemd160 = new RIPEMD160();
ripemd160hmac = new RIPEMD160HMAC();
sha1 = new SHA1();
sha1hmac = new SHA1HMAC();
sha256 = new SHA256();
sha256hmac = new SHA256HMAC();
sha384 = new SHA384();
sha384hmac = new SHA384HMAC();
sha512 = new SHA512();
sha512hmac = new SHA512HMAC();
}
/// <summary>
/// Returns the SHA512 HMAC hash for the file
/// </summary>
/// <param name="FilePath">Path to input file</param>
/// <param name="HashKey">HMAC key</param>
/// <returns>Computed hash value [byte[]]</returns>
internal byte[] GetChecksum(string FilePath, byte[] HashKey)
{
using (SHA512HMAC hmac = new SHA512HMAC(HashKey))
{
int blockSize = hmac.BlockSize;
int bytesTotal = 0;
byte[] buffer = new byte[blockSize];
byte[] chkSum = new byte[hmac.DigestSize];
using (BinaryReader inputReader = new BinaryReader(new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.None)))
{
// start of file bytes
inputReader.BaseStream.Position = MessageHeader.GetHeaderSize;
int bytesRead = 0;
// read into mac
while ((bytesRead = inputReader.Read(buffer, 0, blockSize)) == blockSize)
{
hmac.BlockUpdate(buffer, 0, bytesRead);
bytesTotal += bytesRead;
if (bytesTotal > MAX_SIGNED)
{
break;
}
}
// last block
if (bytesRead > 0)
{
hmac.BlockUpdate(buffer, 0, bytesRead);
}
// get the hash
hmac.DoFinal(chkSum, 0);
}
return(chkSum);
}
}
private void CompareBlocks(HmacAlg Algorithm)
{
if (Algorithm == HmacAlg.Sha256Hmac)
{
byte[] hashKey = new byte[32];
byte[] buffer = new byte[640];
byte[] hash1 = new byte[32];
byte[] hash2 = new byte[32];
using (System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider())
{
rng.GetBytes(hashKey);
rng.GetBytes(buffer);
}
using (System.Security.Cryptography.HMACSHA256 hmac = new System.Security.Cryptography.HMACSHA256(hashKey))
hash1 = hmac.ComputeHash(buffer);
// test 1: HMAC interface
HMAC hmac1 = new HMAC(new SHA256Digest());
hmac1.Init(hashKey);
hmac1.BlockUpdate(buffer, 0, buffer.Length);
hmac1.DoFinal(hash2, 0);
if (!Compare.AreEqual(hash2, hash1))
throw new Exception("hmac is not equal!");
// test 2: class with dofinal
using (SHA256HMAC hmac = new SHA256HMAC())
{
hmac.Init(hashKey);
hmac.BlockUpdate(buffer, 0, buffer.Length);
hmac.DoFinal(hash2, 0);
}
if (!Compare.AreEqual(hash2, hash1))
throw new Exception("hmac1 is not equal!");
// test 3: class with computemac
using (SHA256HMAC hmac = new SHA256HMAC(hashKey))
hash2 = hmac.ComputeMac(buffer);
if (!Compare.AreEqual(hash2, hash1))
throw new Exception("hmac2 is not equal!");
}
else
{
// SHA512 //
byte[] hash1 = new byte[64];
byte[] hash2 = new byte[64];
byte[] hashKey = new byte[64];
byte[] buffer = new byte[128];
using (System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider())
{
rng.GetBytes(hashKey);
rng.GetBytes(buffer);
}
using (System.Security.Cryptography.HMACSHA512 hmac = new System.Security.Cryptography.HMACSHA512(hashKey))
hash1 = hmac.ComputeHash(buffer);
// test 1: HMAC interface
HMAC hmac1 = new HMAC(new SHA512Digest());
hmac1.Init(hashKey);
hmac1.BlockUpdate(buffer, 0, buffer.Length);
hmac1.DoFinal(hash2, 0);
if (!Compare.AreEqual(hash2, hash1))
throw new Exception("hmac1 is not equal!");
// test 2: class with dofinal
using (SHA512HMAC hmac = new SHA512HMAC())
{
hmac.Init(hashKey);
hmac.BlockUpdate(buffer, 0, buffer.Length);
hmac.DoFinal(hash2, 0);
}
if (!Compare.AreEqual(hash2, hash1))
throw new Exception("hmac1 is not equal!");
// test 3: class with computemac
using (SHA512HMAC hmac = new SHA512HMAC(hashKey))
hash2 = hmac.ComputeMac(buffer);
if (!Compare.AreEqual(hash2, hash1))
throw new Exception("hmac2 is not equal!");
}
}
private void CompareBlocks(HmacAlg Algorithm)
{
if (Algorithm == HmacAlg.Sha256Hmac)
{
byte[] hashKey = new byte[32];
byte[] buffer = new byte[640];
byte[] hash1 = new byte[32];
byte[] hash2 = new byte[32];
using (System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider())
{
rng.GetBytes(hashKey);
rng.GetBytes(buffer);
}
using (System.Security.Cryptography.HMACSHA256 hmac = new System.Security.Cryptography.HMACSHA256(hashKey))
hash1 = hmac.ComputeHash(buffer);
// test 1: HMAC interface
HMAC hmac1 = new HMAC(new SHA256Digest());
hmac1.Init(hashKey);
hmac1.BlockUpdate(buffer, 0, buffer.Length);
hmac1.DoFinal(hash2, 0);
if (!Compare.AreEqual(hash2, hash1))
{
throw new Exception("hmac is not equal!");
}
// test 2: class with dofinal
using (SHA256HMAC hmac = new SHA256HMAC())
{
hmac.Init(hashKey);
hmac.BlockUpdate(buffer, 0, buffer.Length);
hmac.DoFinal(hash2, 0);
}
if (!Compare.AreEqual(hash2, hash1))
{
throw new Exception("hmac1 is not equal!");
}
// test 3: class with computemac
using (SHA256HMAC hmac = new SHA256HMAC(hashKey))
hash2 = hmac.ComputeMac(buffer);
if (!Compare.AreEqual(hash2, hash1))
{
throw new Exception("hmac2 is not equal!");
}
}
else
{
// SHA512 //
byte[] hash1 = new byte[64];
byte[] hash2 = new byte[64];
byte[] hashKey = new byte[64];
byte[] buffer = new byte[128];
using (System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider())
{
rng.GetBytes(hashKey);
rng.GetBytes(buffer);
}
using (System.Security.Cryptography.HMACSHA512 hmac = new System.Security.Cryptography.HMACSHA512(hashKey))
hash1 = hmac.ComputeHash(buffer);
// test 1: HMAC interface
HMAC hmac1 = new HMAC(new SHA512Digest());
hmac1.Init(hashKey);
hmac1.BlockUpdate(buffer, 0, buffer.Length);
hmac1.DoFinal(hash2, 0);
if (!Compare.AreEqual(hash2, hash1))
{
throw new Exception("hmac1 is not equal!");
}
// test 2: class with dofinal
using (SHA512HMAC hmac = new SHA512HMAC())
{
hmac.Init(hashKey);
hmac.BlockUpdate(buffer, 0, buffer.Length);
hmac.DoFinal(hash2, 0);
}
if (!Compare.AreEqual(hash2, hash1))
{
throw new Exception("hmac1 is not equal!");
}
// test 3: class with computemac
using (SHA512HMAC hmac = new SHA512HMAC(hashKey))
hash2 = hmac.ComputeMac(buffer);
if (!Compare.AreEqual(hash2, hash1))
{
throw new Exception("hmac2 is not equal!");
}
}
}
/// <summary>
/// Returns the SHA512 HMAC hash for the file
/// </summary>
/// <param name="FilePath">Path to input file</param>
/// <param name="HashKey">HMAC key</param>
/// <returns>Computed hash value [byte[]]</returns>
public byte[] GetChecksum(string FilePath, byte[] HashKey)
{
using (SHA512HMAC hmac = new SHA512HMAC(HashKey))
{
int blockSize = hmac.BlockSize;
byte[] buffer = new byte[blockSize];
byte[] chkSum = new byte[hmac.DigestSize];
using (BinaryReader inputReader = new BinaryReader(new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.None)))
{
// start of file bytes
inputReader.BaseStream.Position = MessageHeader.GetHeaderSize;
int bytesRead = 0;
// read into mac
while ((bytesRead = inputReader.Read(buffer, 0, blockSize)) == blockSize)
hmac.BlockUpdate(buffer, 0, bytesRead);
// last block
if (bytesRead > 0)
hmac.BlockUpdate(buffer, 0, bytesRead);
// get the hash
hmac.DoFinal(chkSum, 0);
}
return chkSum;
}
}
